Supporting spool for spirally coiled film in film developing devices



F. Busse 2,243,453

SUPPORTING SPOOL FOR SPIRALLY GOILED FILI IN FIL DEVELOPING DEVICES May 27,- 1941.

Filed Oct. 6, 1939 lnvenior Ferdinand Busse By his Afforneys nl.

'oitheiilm Patented May 27, 194,1

SUPPORTING SPOOL FOB SPIBAILY m I m IN DEVELOPING DEVICES FerdinandBnasaHnnicLGermanLalignor memealignmenhtoGenex-alAniline .by Film Corporation, New York, N. Y., a corporation ol Delaware Application October 0, 1939, Serial No. 298,191

In Germany October 6,1938

4 claims. This invention relates to daylight developing The known developing reels which consist of two flanges united together by a core have spinalV struction and reliable in operation.

Further objects will become apparent from the detailed specincations following hereinafter.

Reference is made to the accompanying drawing in which Fig. 1 is a section through the developing reel at right angles to the axis of the core of the reel. while Fig. 2 is a top plan view o! the reel.

In the iigures corresponding reference numetals indicate corresponding parts.

The developing reel consists oi the core I and the end anges 2, I. Each oi the latter is provided with a guide groove l formed by the continuous spiral rib I and into this groove the nlm I is drawn trom'within outwards by means of the draw-band l attached by a clamp 1 so that the nlm enters the groove.

Since the drawing band is narrower than the nlm, the drawing band is wound onto the core I while the iilm 5 is engaged. by the raised ends la upon being drawn into the reel. Upon iurther rotation oi the reel, the film .is guided into thespiral'groovesl.

'me guide grooves a each begin with the m- Vportion of theiilm from the reel: owing to these provisions the tingbathhasfreeacceestotheiirstportion The innermost turn la of the rib the spiral grooves oi' the reel. In the reels hitherto known of this kind the spira1 guiding grooves lead up to the core oi the spool. They have the disadvantage that the end part ot the iilm rests for a more or less considerable length on the core o! the spool and thus the developer or the nxing solution as the case may be does not have free access to the end portion of the nlm; In order to avoid this disadvantage and to allow unhindered and sumcient access to the inner part oi' the spool of the treatment bath, the construction ot the invention is such that the distance between the innermost end oi one spiral rib from the innermost end ci the spiral ribontheoppodteiiangeislessthanthedistancei'romeaohotheroi'theremainingportions of lthe two ribs. Furthermore the innermost spirslturnoneachnangeisarrangedatacertain distance from the `core of the reel so that the openings in the iianges may be oi' considerable sise. The distance oi' the innermost spiral turn from the core of the reel should be at least equal to the diameter of the core.

By raising the height of the innermost portionsoi'theribsitisensuredthattheiirst part of the film does not come to rest against the core but is at a certain distance therefrom so that the treating bath has iree access to the nlm. Moreover by raising the height of the innermost portions of the guide ribs the insertion oi the iirst portion of the 111m in the innermost spiral groove is ensured. By. drawing the nlm into the groove bymeans of the draw-band the first portion oi' the hlm in consequence of the smaller distance apart o! the two inner guiding ribs from each other engage these higher parte and can easily be introduced into the further portion4 thereof.

Guiding means for introducing the iiim into thereelandtowinditi'romwithinoutwards intothespiralgroovesareforinstancedisclosed in U. S. Patent No. 2.082.962 to Lesllak-` et al. K

I claim: s Y

l. A developing reel for daylight developing tanks comprising in a core. two nangesamxedtosaidcore,eachhavingspira1 ribs on the inner side thereof, the distance between the ribs of one flange and the ribs of the other ilange being `smaller than the breadth of the'iilm, raised end pieces being arranged at the innermost end of'said ribs to render the distance betweentheendpieceoi' therib oi one `:langem:theammesso:mamme:thecom ilenge smaller than the distance between .said

2. A developing reel for daylight developing i niza eemnrising in eembineon e. core, tw@ to said cere, eeeh having spiral vibe en. me limer eide thereof, ille distance ber'eween files oi' @ne and the ribs of the @il dang@ being ein-alleii-lien me bi'eedtn of i'ilm, :raised end nieces Yeeing arranged at the innemen end ef files QQ render me disleiween the endpieee el' the rib of one the endniece ef rib ef the @they lienge emailen elem me diunnee between seid eine, @eid innemnest end nein@ arranged et e. demenee 'from `@he core of me reel corresponding sul izan'ially with the le ef the diameter ei said nere.

A developing reel im daylight developing tanks eemprsing in cnmbivetion a core, two langes aiixed to said cere, each having spiral nbs on the inner aide thereof, the distance between ehe ribs of one Bange and the ribs of 4une other flange being smaller than the breadth ef the ilm, raised end pies being arranged at the innermost end of said ribs to render the distance eme-15e between. the empiece @i the rib of ene flange and the endpieee @f *eine rib of the other flange smaller @han the distenee between ribs, said izmermesi end pieces eirenged ei; e distance fi'om: hhe eme of bhe feel @met 1 euiistentially with @he length of the .seid eme, openings being arranged; lie enge weils in `he .spese between said core the innemoei; tum of ep i rib.

2. i developing ieel i daylight developing teni@ comprvieing in eembnzitien e, wie having e, subs'bani-ieily eeni'lnueue eylindeei eurfeice, two Lismges exeri to said eoie, each? fng spiral files @inthe innein sidev 'bi'ieeei the `fffeefi the ribs. one flange erm *It 0i; el '.mige being smalle j im, raised end pieces g iimermest ends of seid i* es 1 ien between lalle end flange' and the end piece of the rile e flange smaller than 'bhe distance leeiween said ribs, seid innemest end end pieces being spaced a substeniie distance imm the sui'- fece of said eore.

FERDINAND RUSSE. 

